The bank has sought to reassure regulators it is fixing problems that have emerged following its sales-practices scandal.

Wells Fargo & Co. is firing around three dozen district managers for oversight failures related to a sales scandal that erupted in its retail bank more than two years ago, according to people familiar with the matter.

Senior executives, including consumer banking head Mary Mack, have briefed the Office of the Comptroller of the Currency on the firings, one of the people said. The bank has sought to reassure regulators it is fixing problems that have emerged throughout the bank following the sales-practices scandal.